import java.util.Arrays;

public class TestDemo3 {
    public static void transform(int[] array){
        for (int i = 0; i < array.length; i++) {
            array[i] = array[i] * 2;
        }
    }
    public static void main(String[] args) {
        int[] array = {1,2,3};
        transform(array);
        System.out.println(Arrays.toString(array));
    }
}
